Chemistry
(a)
(0.5 points) (i) Write the balanced equation for the combustion of 1-hexyne.
(1.0 points) (ii) Draw the VSEPR structure of all reactants and products.
(1.5 points) (iii) Determine ΔcombH using Table 9.1 in your textbook.
(1.0 points) (b) When 1.600 g of 1-hexyne was combusted in a constant volume calorimeter, the temperature increased from 23.00 to 25.35 °C. Determine the heat capacity of the calorimeter. Express your answer in kJ/oC. You can ignore any difference between ΔcombH and ΔcombU (that is, you do not need to consider ΔcombU in your calculations).
(1.5 points) (c) The same calorimeter was used to determine the energy in a slice of birthday cake. A 134.5 g slice of birthday cake was homogenized. 1.750 g of the homogenized birthday cake was combusted, causing the temperature to increase from 25.50 to 28.45 °C. Determine the energy in the original serving of birthday cake. Report your answer in Calories. Note: 1 Calorie = 4.184 kJ
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Calorimetry can also be used to determine nutritional Calories, which are actually kilocalories. One (1) nutritional...
Calorimetry can also be used to determine nutritional Calories, which are actually kilocalories. One (1) nutritional Calorie = 1000 calories, and 1 calorie = 4.184 J. When 1.0 g of a snack cake is combusted in a constant-volume bomb calorimeter with a heat capacity (including its water) of 10.0 kJ/°C, the temperature of the calorimeter rises by 1.88°C. How many nutritional calories (Calories) are in one serving (28 g) of this snack cake? Enter your answer to three significant figures...
A researcher studying the nutritional value of a new candy places a 5.70 gram sample of...
A researcher studying the nutritional value of a new candy places a 5.70 gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.61◦C. If the heat capacity of the calorimeter is 41.70 kJ/K, how many nutritional Calories are there per gram of the candy?Solve: -qrxn= qcalorimeterWhat is the formula for heat (q) for the calorimeter?___________________Did the calorimeter absorb/release heat? Circle your answer.Calculate the energy absorbed by the calorimeter.How many...
2 attempts left Check my work Enter your answer in the provided box. The energy content...
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Heat Capacity The temperature of an object increases by 29.0 °C when it absorbs 3693 J...
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Bomb calorimetry is a technique used to determine the enthalpy of combustion, usually in O2, of...
Bomb calorimetry is a technique used to determine the enthalpy of combustion, usually in O2, of a chemical species. A known amount of compound is placed inside a fixed volume container that is, in turn, filled with oxygen at a high enough pressure to ensure complete combustion. The fixed-volume container (the 'bomb') is then inserted into a bucket containing a precisely known volume of water. The oxygen and compound are ignited, and the temperature change in the water is recorded....
When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be det...
When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 2.99 g of FeBrz(s) are dissolved in 102.70 g of water, the temperature of the solution increases from 25.90 to 29.34 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.59 J/°C....
B. 10 points In the Calorimetry lab you determined an experimental value for the heat of...
B. 10 points In the Calorimetry lab you determined an experimental value for the heat of fusion of ice. The density of water is exactly 1 g/mL ATater is the temperature change of the water after the ice cube has melted. Tr-T, ke ATal is the total temperature change of the calorimeter Tr T, cal Use the data in the table to determine an experimental value for AHsi Determine a percent error if the known value is 6.02 kJ/mole Show...
56,57,58,59,60,61,62 56) For the reaction 3H2(g) + N2(g)s-2NH(g), determine the equilibrium constant at 600°C if at this temperature, the equilibrium concentrations are: [N2 453 M; H:-2.49 M and [...
56,57,58,59,60,61,62
56) For the reaction 3H2(g) + N2(g)s-2NH(g), determine the equilibrium constant at 600°C if at this temperature, the equilibrium concentrations are: [N2 453 M; H:-2.49 M and [NHs] 7.62 M 57) When a sample of aqueous hydrochloric acid was neutralized with aqueous sodium hydroxide in a calorimeter, the temperature of 100.0 g of water surrounding the reaction increased from 25.0°C to 31.50. If the specific heat of water is 1.00 calV(g.°C), calculate the quantity of energy in calories involved...
Mail - yitsi almeida - Outlook Q Study 16 Terms Chem 6 Flash * Q Potential...
Mail - yitsi almeida - Outlook Q Study 16 Terms Chem 6 Flash * Q Potential and Kinetic Energy Rex m/courses/1093038/quizzes/1706760/take Question 4 x Get Homewe 2 pts Determine the heat required to raise the temperature of a piece of iron(mass = 245 g) that starts at 25.0°C and is heated to 85.0°C. The specificheat capacity of iron is 0.449 J/gºC. SHOW WORK Upload choose a File D Question 5 4 pts A4.98 g sample of phenol (C,H,OH, molar mass...
Please answer questions 1 and 2 on The rate constant for the reaction answered A +...
Please answer questions 1 and 2
on The rate constant for the reaction answered A + B->C out of 1.0 is 4.1 x104 U(mol s) at 593 K. The activation energy is 101 kj/mol. question Determine the temperature when the rate constant is 1.2 x10-3 L/(mol s)- Answer: 2 One (often inaccurate) rule of thumb in biology is that a 10 °C change increases the rate by a factor of ten. If the lower temperature is 3 °C, what activation...
2 attempts left Check my work Enter your answer in the provided box. The energy content of raisin bread is 13.1 kJ/g. Calculate the temperature increase when a slice of raising bread (34.0 g) is burned in the calorimeter. The heat capacity of the calorimeter is 38.77 kJ°C.
Heat Capacity The temperature of an object increases by 29.0 °C when it absorbs 3693 J of heat. Calculate the heat capacity of the object. What is the formula for heat (9) that does not contain a variable for mass? Solve: Calculate the specific heat capacity of the object if the object weighs 331 grams. What is the formula for heat (g) that contains a specific heat capacity term? Solve: Calorimetry A researcher studying the nutritional value of a new...
Bomb calorimetry is a technique used to determine the enthalpy of combustion, usually in O2, of a chemical species. A known amount of compound is placed inside a fixed volume container that is, in turn, filled with oxygen at a high enough pressure to ensure complete combustion. The fixed-volume container (the 'bomb') is then inserted into a bucket containing a precisely known volume of water. The oxygen and compound are ignited, and the temperature change in the water is recorded....
When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 2.99 g of FeBrz(s) are dissolved in 102.70 g of water, the temperature of the solution increases from 25.90 to 29.34 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.59 J/°C....
B. 10 points In the Calorimetry lab you determined an experimental value for the heat of fusion of ice. The density of water is exactly 1 g/mL ATater is the temperature change of the water after the ice cube has melted. Tr-T, ke ATal is the total temperature change of the calorimeter Tr T, cal Use the data in the table to determine an experimental value for AHsi Determine a percent error if the known value is 6.02 kJ/mole Show...
56,57,58,59,60,61,62
56) For the reaction 3H2(g) + N2(g)s-2NH(g), determine the equilibrium constant at 600°C if at this temperature, the equilibrium concentrations are: [N2 453 M; H:-2.49 M and [NHs] 7.62 M 57) When a sample of aqueous hydrochloric acid was neutralized with aqueous sodium hydroxide in a calorimeter, the temperature of 100.0 g of water surrounding the reaction increased from 25.0°C to 31.50. If the specific heat of water is 1.00 calV(g.°C), calculate the quantity of energy in calories involved...
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Please answer questions 1 and 2
on The rate constant for the reaction answered A + B->C out of 1.0 is 4.1 x104 U(mol s) at 593 K. The activation energy is 101 kj/mol. question Determine the temperature when the rate constant is 1.2 x10-3 L/(mol s)- Answer: 2 One (often inaccurate) rule of thumb in biology is that a 10 °C change increases the rate by a factor of ten. If the lower temperature is 3 °C, what activation...
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